Double-horn construction for graphophones



5 6 .t 2 w m 2 w JIY. 5 l s 6 l u e h SS u F m w V "n P m G2 Mmw z z Lw I www w mm 9 m I u 0 nn E 4 m a m Z Z 47: 5 2 0 9 1 1 6 I m M Patented Jan 6, 1925 FRANK w. WILLIAMS, OF GHCAGC, ILL noIs.

DOUBLE-HORN CONSTRUCTION FOR -GRAPHOPHONES Application filed September 10, 1921. Serial No. 499572.

To all whom it may cmwem:

Be it known that I, FRANK W. /VILLIAMS a citizen of the United States, and a resident of the city of Chicago, in the County of Cook and State of lllinois, have invented certain new and useful Improvements in a Double-Homi Construction for Graphophones; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to a new and improved phonograph horn Construction 'Lin which a double amplifying horn is used with the result that a greater Volume of sound can be produced with the same 'or with even a less amount of cabinet space underneath the disk supporting table. Heretofore a great deal of inconvenience and difficulty has been experienced by designers of phonograph cabinets on account of the factthat the amplifying horn and the driving mechanism for the revolving disk supporting turn-table seriously interfered with each other because of the fact that the same space which would be most desirable is not available for both.

Therefore, a primary object of this inventon is to provide a phonograph hornin which anple space for the driving mechanism remains after the phonograph horn has been inserted in the cabinet. I

A 'further object of this invention is the provision ot a double phonograph horn whereby the Volume of sound issuing therefrom may conveniently and readily be regulated to any degree by merely adjusting the position of one or both of the doors provided for the openings of the double horns.

A still further object of this invention is to provide a more compact and hence more neat appearing cabinet Construction.

Other and further important objects of the inVenti-on will'be apparent from the disclosures in the specification and the accompanying drawings.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a top plan View of my improved form of phonograph cabinet showing a record upon the revolvng turntable.

Figure 2 is a section taken on the line 2-2 ofFigure 1.

Figure 3 is a section taken on the line -3-3 of Figure 2, looking in the direction indicated by. the arrows Figure 1 is a section, partly broken away, I taken on the line 4-4 of Figure 2, looking in the direction indicated.

Figure 5 is a front view showing the doors of the improved double horn.

As shown on the drawings:

The reference numeral' 6 indicates a phonograph cabinet of ordinary Construction having therein the usual revolving record holding table 7 cooperating with a reproducer 8 and a swiveled sound'conducting tube or tone arm 9 which is held in position on the cabinet shelf by the usual plate 10. An opening 11 communicates between the sound conducting tube 9 and another sound conducting chamber 12 of square cross section which eXtend transversely across the machine at the rear thereof directly underneath the base 'of the sound conducting tube 9. This second sound conducting chamber 12 is preferably made of Wood or other suitable material and has at its further end two apertures 13 and 1 1 which in turn lead into connection with the double horns 15 and 16 respectively and which are preferably of the shape shown in Figures 2 and 3. These horns are constructed 'of slantingly extending side members 17 and 18 and inclined bottom members 19 and 20 respectively thereby forming two similar tapered sound conducting tubes or amplifying horns both terminating at the front of the cabinet and closed by doors 21 and 22 respectively which slide upon each other and are adapted to be opened to any desired degree by means of the knobs provided at 24 and 26. V i

It will be seen that by this Construction the entire middle portion of the cabinet directly underneath the revolving record holding table is left free to accommodate the driving mechanism of the graphophone, the proper positioning of which has heretofore caused serious inconvenience in designing the location of the sound conducting tube. Also by this method a much better blending of the sounds can be produced as the sound waves are first dividedin the V sound conducting tube 12 and then separately amplified in passing through the double hoi'n Construction 15 and 16 and upon issuing from same ;menge-in reunted before teaching the ear, therehy resulting in a much more pleasing efiect.

As is also evident, the Volume of sound produced can Conveniently he divided in half by chasing one of the doors, or otherwise regulated between the maximum and minimum limits by' merely adjusting the position of one io both of the slidng doors.

I am ::Ware that the details of Constructon may he vai'ied through a Wide range Without departing 'from the prneipes of this invention and E the'efore do not purpese limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

n a phonograph Gabimet, an ampifie' having a plurality of spaced outlets p-osed in the side walls oi" the Gabimet, and sliding doors for said outlets each adapted to close one of said outlets, said doors when opened sliding one behind the other to oe- Cupy a common space between said outiets.

In testim'ony WhereoI" E have hereunto subscrhed my name in the presence of two suhseribmg witnesses.

FRANK VJ. VVILLAMS. Vii tnesses OSCAR HARTMANN, JAMES M. O,BRIEN. 

